B. Pleural Effusion
D. Lung Collapse
Large left pneumothorax with mediastinal shift to the right. Note the collapsed left lung (arrows) and the hyperlucent left hemithorax.
- The absence of vascular markings in the periphery of the left hemithorax is due to air in the pleural cavity and not in the lung.
- Pneumothorax represents abnormal air accumulation within pleural cavity. This may be due to trauma (accidental or iatrogenic) , underlying pulmonary disease (e.g. asthma) or idiopathic in origin
- Erect chest radiograph in full expiration is diagnostic in majority of cases
- If the patient is unable to stand erect, lateral decubitus view may be helpful for diagnosis
- Note the radiological features of tension pneumothorax seen in this patient include:
- Contralateral mediastinal shift
- Depression of ipsilateral hemidiaphragm
- Compressive atelectasis of adjacent normal lung